Terms of Use for images in the The Jerry Slocum Mechanical Puzzle Collection:

The images in this database may be used for non-commercial educational or research purposes. If you use or reproduce our materials in any format, we ask that the Lilly Library always be cited as the source of the material with the credit line: Courtesy, The Lilly Library, Indiana University, Bloomington, Indiana. For commercial uses, please contact the Lilly Library at 1200 East Seventh Street, Bloomington, Indiana, 47405-5500 or at http://www.indiana.edu/~liblilly/